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Noncontact measurement of high-temperature surface tension and viscosity of bulk metallic glass-forming alloys using the drop oscillation technique

Mukherjee, S. and Johnson, W. L. and Rhim, W. K. (2005) Noncontact measurement of high-temperature surface tension and viscosity of bulk metallic glass-forming alloys using the drop oscillation technique. Applied Physics Letters, 86 (1). Art. no. 014104. ISSN 0003-6951. http://resolver.caltech.edu/CaltechAUTHORS:MUKapl05

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Abstract

High-temperature surface tension and viscosities for five bulk metallic glass-forming alloys with widely different glass-forming abilities are measured. The measurements are carried out in a high-vacuum electrostatic levitator using the drop oscillation technique. The surface tension follows proportional mathematical addition of pure components' surface tension except when some of the constituent elements have much lower surface tension. In such cases, there is surface segregation of the low surface tension elements. These alloys are found to have orders of magnitude higher viscosity at their melting points compared to the constituent metals. Among the bulk glass-forming alloys, the better glass former has a higher melting-temperature viscosity, which demonstrates that high-temperature viscosity has a pronounced influence on glass-forming ability. Correlations between surface tension and viscosity are also investigated.


Item Type:Article
Additional Information:©2005 American Institute of Physics (Received 4 August 2004; accepted 3 November 2004; published online 28 December 2004) This work was carried out at California Institute of Technology under a contract with the National Aeronautical and Space Administration (Grant No. NNMO4AA21G).
Subject Keywords:zirconium alloys; titanium alloys; copper alloys; beryllium alloys; nickel alloys; aluminium alloys; niobium alloys; cobalt alloys; tin alloys; eutectic alloys; liquid alloys; vitrification; surface tension; melting point; viscosity; surface segregation
Record Number:CaltechAUTHORS:MUKapl05
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:MUKapl05
Alternative URL:http://dx.doi.org/10.1063/1.1844596
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:1790
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:18 Feb 2006
Last Modified:11 Dec 2014 00:31

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